Key words for GCSE Maths

congruent 
Congruent shapes are identical.


crosssection 
A crosssection is found by slicing a 3D shape.


decagon 
A decagon is a shape with ten sides.


diameter 
The distance through the centre from one side of a circle to the other is called the diameter.


hypotenuse 
The hypotenuse is the longest side of a triangle.


vector 
A vector has both size and direction and describes the movement of an object.


locus 
A locus is a pattern formed by a point that moves according to a rule.


loci 
Loci is the plural of locus.


perimeter 
The perimeter is the distance around the shape.


perpendicular 
Perpendicular lines are at right angles to each other.


Pi 
The ratio of the circumference to the diameter of a circle is called Pi.


polygon 
A shape with more than three sides is a polygon.


prism 
A 3D shape with a constant crosssection is called a prism.


tangent 
A tangent is a straight line that touches a circle only once.


sine 
Sine is the ratio of the hypotenuse and opposite in a triangle.

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